This case contains three connections for you to install. Two all white plugs and one white plug with a pink ring. There are no instructions in the box and the seller's answers in the questions are almost incomprehensible. Through trial and error and deciphering the seller's explanations, I came up with the following: White plugs: 1. A white plug goes into a detachable plug. This is the water inlet. In my system, the water supply line to the housing is yellow.2. The other white connection is for the clear water outlet. Install it at the end that requires two connectors in a socket closer to the center. The pure water hose in my system is green. Green = clean. Has the meaning. Connection with pink ring: This is for waste water, water that enters the housing but is not filtered. This port contains a non-return valve. This enters the remaining exit, which is noticeably off-center and closer to the side of the case. In my system the connecting hose is black because this water is evil. I hope this will save some other buyers the headache I got from what was actually a very easy install.
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